Veikk 1560 (Wacom Cintiq alternative) compatibility issues
you can contact their tech support , this may the issue of veikk 1560 driver . so you can't use the two buttons of the stylus .

I've had a XP-Pen G430 OSU tablet for many years that has proved to be handy. And I've seen a top-of-the-line XP-Pen pen display monitor that cost about 450 dollars. This 16-inch Artist 15.6 Pro drawing tablet with screen intended for people who want a pen monitor product but find the high-end prices too high for them. That is, people like me.

For people like me, this is impressive. Being able to use the pen right on the screen makes a big difference. And make no mistake, the pen draws right where it contacts the screen. There are no problems with parallax (at least that I could see -- I didn't perform any tests). That makes sketching and drawing almost like using a pen on paper. Better in some ways. it works well with Blender and Photoshop art programs .